PC keeps freezing at random. No BSOD, just hard locks up.


Hello all, my PC keeps freezing at random. I could be checking out vids on Youtube, and the whole system would just lock up. Or, I could be leaving it on to download some files, and it would lock up too. It's really quite random, and I can't determine exactly when it would lock up.

As an example, suppose I'm watching Youtube, and the video's playing. When the system freezes, the audio will be stuck in an infinite looping sequence, like "R-R-R-R-R-R-R-R-R-R-R-R-R-R-R-R-R". Windows doesn't BSOD, nor does it automatically restart. I have to manually restart it. Also of note, when I reset the system, I don't get the usual "Windows has just recovered from a serious error" message that one gets when something like that happens.

-edit- Also, if this little bit of information helps, the PC sometimes can go on for several hours without hanging.

Tried solutions

Thus far I have run memtest for memory, OCCT (GPU), OCCT (CPU) and HDTune for HDD. All have come up with no errors. Then, I thought it must be software conflict, so I wrote the drive to zero and reformatted it. Surprise surprise, the system still locks up. So now I'm certain the fault lies with either the PSU or mobo. I can't really place my finger on which it is though.

Computer specs

Here are the specifications of my system, including OS:

OS: Windows XP Pro SP2
CPU: AMD Athlon II X3-455
MB: GA 970A-D3
RAM: Kingston DDR3-1333 4GB
HDD: Western Digital 500GB SATA3
GPU: Palit GTX550 Ti 1024MB DDR5
PSU: Seasonic 560W X-Series

Attached to my USB ports are:

ZyXEL G-202 USB Network Adapter

What needs to be done?

With that being said, what should my next course of action be? I'm at a loss here :(
8 answers Last reply
More about freezing random bsod hard locks
  1. A hard lock without BSOD usually points to something on the memory bus. Since you've tested your RAM, I'd suspect issues elsewhere. I've seen bad slots but on DIY builds it is far more common that something like your memory voltage isn't set right for the RAM speed in the BIOS is perhaps the most common. I've seen CPU's go bad or be under volted as well. Sometimes a BIOS update helps... If you have never updated your BIOS I'd look at the various BIOS revisions on Gigabytes website to see if any of them had a problem/fix for this issue.
  2. Thanks man. How do I set the voltage right? What's the correct voltage?
  3. I think it will be the motherboard. I have had problems with Gigabyte boards losing communication with the HDD. The normal symptom is a straight lock up with no BSOD. Another sign is the HDD being lost in the boot order in BIOS. However this problem will not always be present. I think your motherboard is suspect number one at this stage imho.
  4. Also, if this little bit of information helps, the PC sometimes can go on for several hours without hanging.
  5. Well my computer is doing this same thing and idk what is happening so can anyone help me out, it just freezes out of no where i tried getting rid of some of the drivers which i though could be causing the problem but idk pls help
  6. Jim_L said:
    Also, if this little bit of information helps, the PC sometimes can go on for several hours without hanging.

    my problem is exactly the same as ur i have a Gigabyte Motherboard nd this is happening idk what it is i have everything set up properly but idk if i have to change the power settings or something like that
  7. I've been having the same issue. Seems to happen more after it has been powered off overnight. After the lock up, if I do a hard boot (power down and restart), the computer can goon for hours, even days, without locking up. I have a Gigabyte board also. I'm suspecting a bad motherboard or some sort of solder connection that has issues going from cold to warm. once warm, it tends to stay on as long as I keep the system running without locking up. But, should I turn the computer off over night, then on in the morning, I either risk a lock up, or just do a hard boot after about 10 minutes, assuming no lock up in that time-frame, then it all seems well from there on.

  8. im having the same issue with a msi motherboard i have changed the cpu for a new one and replaced graphics card, next will try the memory but im completely confused only really happens when steaming from youtube seams like it just can't handle doing 2 things at once. best tester i have found is performance test by passmark
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